Hose coupling device



July 25, 19% c. M. MORE 7 HOSE COUPLING DEVICE 3 Sheets-Sheet 1 FiledAug. 29, 1947 INVENTOR ATTORNEY Jufly 25 119% 2,516,583

HOSE COUPLING DEVICE Filed Aug. 29, 1947 3 Sheets-Sheet 2 INVENTOR 6.Mae/c6 wales;

ATTORNEY Jufly 25 1950 c. M. MQORE HOSE COUPLING DEVICE 3 Sheets-Sheet 3Filed Aug. 29, 1947 INVENTOR CT M ue/ce fifaaea;

BY Mm M ATTORNEY Patented July 25, 1950 IATENT OFFICE HOSE COUPLINGDEVICE Clyde Maurice Moore, Richmond, Va.

Application August 29 19 Claims.

This invention relates to a hose coupling device and compression membersfor use therein, and more particularly to coupling devices for use inmaking hoseand/or pipe connections...

One object of the invention is to provide a coupling wherein acontracting annular wedging action is produced for contracting andbindingthe end of ahose in the coupling around a shank or nipple toprovide a primary seal, and for advancing the extremity of the hose intothe coupling and against a shoulderfor effectively sealing the end faceof the hose in the coupling by a powerful axial thrust, therebyproviding a secondary seal.

Another object of the invention is to provide a compression member forproducing the said wedging action comprising highly machined parts whichmay be so arranged relative to each other, the hose, and the couplingdevice as to provide a tertiary seal.

A further object of the invention is to provide a coupling device. witha protecting guard which will act to limitthe angle atwhich the hose maybe bent and distribute thestrain placed upon. the hose at the coupling.

Another object of the invention is to provide an efiicient, simplyconstructed and durable coupling device that can be quicklyandeasily-con- I nected to or disengaged from-a hose without the use ofspecial tools or equipment, and can in fact, be so connected anddisengaged entirely by hand.

Other and further objects of the inventionwill I become apparent asthe..desc ription proceeds, reference being made to the accompanyingdrawings forming a part of the-presentdisclosure, wherein:

Figure l is a longitudinal sectional view. taken through a hose couplingconstructed according to the present invention showing the hose Com-.-pressed and advanced into sealing. engagement in the coupling;

Figure 2 is asimil hose removed;

Figure 3v is an exploded side elevational view I of the iorm ofcompressionmember illustrated in Figs. 1 and 2, parts being shown insection, andthe. slots in each element aligned;

Figure 4 is a fragmentary. end elevational view of the right element ofthe compression member illustrated in Fig. '3 looking to the left, andillustratin the slot formed in each element of the compression member; It

Figure 5 is an exploded side elevational view of a'modified form of thecompression member i1- r sectional view with 194'7 Serial No. 771,358

lustrated in Figs. 3 and 4, parts being broken away and parts beingshown in section, the slots staggered. as inv in the several elementsbeing actual .use;

Figure 6 is an exploded of a still further modified form of compressmember, parts being shown in section;

Figure 7 is a fragmentary end elevational view of the left element ofthe compression member illustrated in Fig. 6, looking to the right (thelower right quadrant of this element is omitted in Fig. 6)

Figure 8 is a, fragmentary end elevational view of the right element ofthe compression member.

left quadrant of this element is omitted in Fig. 6)

Figure 9 is an exploded longitudinal'sectional View of a modification ofthe compression member illustrated in Fig. 6;

Figure 10 is an end elevational view of the compression memberillustrated in Fig. 19 with the component parts thereof in assembledrelation;

Figure 11 is a fragmentary longitudinal sec- Figure 12 is a fragmentarylongitudinal sectional view taken through the nut and compression memberand illustrating a slightly modified form of the compression memberillustrated in.

Figs. 6 to 8 or Figs.-9 and 10; I

Figure 13.is a side elevational view ofa mo die parts shown in section;

Figures l4, l5 and 16 are side away, and parts being. shown in section;

Figure 17 is a longitudinal sectional view of... the nut and protectingguard illustrated inl igs.

1 and 2;

Figure 18 is a side elevational view sees-e11 further modified. formotcompression member;

and Figure 19 is a of the compression members above referred. to.

Referring more particularly to Figs. 1 to 4, l5

and I! of the drawings, in which one form of. coupling deviceconstructed according to tl' e-in- 5'5" vention is shown, it win be seenthat my device side elevational View ion structed in accordance with thepresent inven fied form of nut, parts being broken away andv elevationalviews of three types ofnipples or shanks that maybe. used in my couplingdevice, parts being broken.

fragmentary longitudinal secs 1 tional view illustrating a modified formof an -nular recess and groove that may be used in; connecting all orcertain ofthe component parts comprises a housing or female member ihaving a cylindrical end portion 2 which may be provided with a male orfemale thread depending upon whether the outlet to which it is to beconnected is internally or externally threaded. In the embodiment shown,the end portion 2 is provided with an external screw thread 3 which isadapted to screw into the screw thread of the outlet of a gasoline oroil pump or tank, a nozzle or the like. .Itmay be noted that insofar asthe gasoline or oil-pump or tank and the like is con-- cerned, thefemale member or housing may be made an integral part of the pump, tank,nozzle or the like structure, if desired, since it is never necessary toplace this-member in a vise or the like to remove and replace the hose.

Integrally associated with the cylindrical end portion 2 of the housingI is a sleeve 4 having a tapering inner surface or wall 5 offrustoconical configuration forming an inwardly or forwardly convergingtapered bore 5'. The smallest diameter of the bore 5' is larger than theinner diameter of the endportion 2 and thus an annular shoulder 3 isprovided at the inner end of the sleeve 4. The outer end portion 1 ofthe sleeve 4 is cylindrical or of uniform inner diameter and is providedwith an internal screw thread 8 adapted to receive a substantiallyannular male member or compression nut 9 to be later described.

The cylindrical end portion 2 of the housing i carries a nipple or shankI 0 therein which extends into and through the sleeve 4 to substantiallythe outer end thereof. The nipple [0 extends through the sleeve 4 inspaced relation thereto and provides therewith a substantially annularspaceor chamber into which the free end of a flexible hose II isreceived.

Preferably, the nipple or shank i0 is provided with external shoulderedteeth or barbed projections l2 although any desired surface formationmay be'used. In Fig. 14, for example, the modified form of nipple orshank 10' illustrated has a smooth outer surface, and in Fig. 16, themodified form of nipple I0" is grooved to provide a spaced series ofannularrings l3.

The annular compression nut 9 is provided with an external screw threadI at the forward end thereof which is adapted to be received by thescrew thread 8 of the member I. Also, this end of the nut 9 is providedwith an inwardly directed annular flange or wall l5 having a rearwardlysloping or tapering forward face 16. The slope of the forward face orwall is preferably such as to form a right angle with the tapering innersurface or wall 5 of the sleeve 4 for a purpose to be later described. Q

Preferably, but not necessarily, the forward outer edge portion of thenut 9 is beveled as indicated at I! and engages a complemental flaringwall l8 within the sleeve I "at the innermost position ofthe nut 9. thewall 18 functions'a's a stop member to limit the inward movement of thenut 9. t i v The compression nut 3 is preferably provided with anintegral'tail piece in the form of a protecting annular member or guardl9 which acts thereof. The free end '22 is preferably outwardly flaredand rounded off in the form of a bead, as illustrated, to prevent damageto the hose, and the guard 19 is spirally cut to form a spiral slot 23.From the foregoing it will be obvious that resistance to bending orlateral movement of the guard l9 gradually increases inwardly from thefree end 22 thereof, and hence, the curvature of the hose, when pulledsideways, gradually increases at a safe angle. The hose when pulledsideways is thus supported over an extended portion of its surface andall sharp lines of contact between the hose and coupling are eliminated.Recurring localized strains to which such hose is usually subjectedduring use are thereby avoided and the life of the hose greatlyincreased.

A modified form of the compression nut 9 is indicated by the referencenumeral 9' in Fig. 13. The nut 9' diifers from the nut 9 principally inthat the annular guard I9 is omitted, and the inner wall at the free endthereof is flared outwardly as indicated at 24. The nut 9' is providedwith an external screw thread M which is adapted to be received by thescrew thread 8' of the member I, and an inwardly directed annular flange[5' having an inwardly sloping or tapering forward face or wall It. Aspreviously described in connection with the nut 9, the slope of theforward face or wall It is preferably such as to form a right angle withthe tapering inner surface or wall 5, of the sleeve 4 for a purpose tobe later described. The forward outer edge portion of the nut 9' may bebeveled as indicated at 11', and preferably, a roughened external band25 is provided on the nut 9' (as well as on the nut 9,

but not illustrated) to facilitate the turning thereof.

The type of compression member A illustrated in Figs. 1 to 4 is annularin form and comprises four metallic annular or ring-like elements 25,21, 2B and 29. Each of the elements 26, 21, 28 and 29 is of split-ringform and has a slot 30, 3|, 32 and 33, respectively, extending through asubstantial angle to render each element resilient or compressibleradially inwardly.

The compression member B illustrated in Fig. 5 is a, slightly modifiedform of the compression member A. The member B is annular in form andalso comprises four metallic annular or ringlike elements 26, 21', 28and 29, the element 28 being exactly the same in both members A and 7B.The elements 26', 21, 28 and 29, as illustrated in Fig. 5, have slots30, 3|, 32 and 33, respectively, as previously described.

The angle through which each of the slots 3.0,

- -3l 32 and 33 extends is preferably approximately 49". This angle willvary, however, depending upon the particular metal used, the thicknessof the metal, etc., and thus the value of 49 is given merely by way ofillustration and not by way of limitation.

The elements 26, 26' and 28 are frusto-conical in side elevation,converging forwardly as illustrated, and the tapering outer walls.- orsurfaces 34, 34 and 35, respectively, have the same taper as thefrusto-conical wall 5. The maximum diameter of the tapering bore 5 ispreferably just slightly greater than the maximum outer diameter of themember 28 or 28'. This relationship provides substantially maximumcompressibility and at the same time permits the compression member tobe easily started into the tapering bore 5' before being compressed. Thewalls 34 and 35, in assembled relationship, form a substantiallycontinuous surface and hence closely engage the wall-S an thecouplingassembly. Since the angle ,of taper of fthebore is equal to theangle of taper of the walls34 and 35, the compressive stresses'areuniformly distributed throughout the entire peripheral area of thecompression membersa" Preferably, the axial length of the .bore slightly-.exceeds-' the. axial length of the compression members above describedand to be described,to provide room for expansion of the end'of the hoseI hand,- assuming that the movement of the compression members into thebore 5' isl imitedto alignment'of the rearward end of thecompression-member with the rearwardend of the bore 5',- it is onlynecessary that themaximum outer diameter of the compression. member begreater'than the maximum diameter-of. the bore 5', in. order to causecompression of the compression member.

In generaLit may be statedsthat the compression members herein disclosedhave larger-cuter diametric-al dimensions than'the diametricaldimensions of the bore '5".

The elements 26 and 26' are each provided with two internal,:annularrecesses'36 and 31, in stepped offset relationship, and an inwardlydirected annular flange 38 is provided-adjacent the rearward end of theelement 26or 26' and recess 31. W

The elements-21 and-21'- are so-dimensioned as to be received withinthe-forward endportion 39 of the element 26- or 26', and eachis-provided with an external, outwardly-directed: annular flange anadjacent its rearward edge which is adapted to be received within theforward portion of the recess 36 of the element-26 or 26'. i

The element 28 is provided externally adjacent its forward end withan'poutwardly' directed annular flange 4| adapted to be-received withinthe recess 31 of the element 26 or 26, andanannular recess or groove 42to the rear of and adjacent the flange 4| which is-"adaptedto receivetheflange 38 of the element 26 or 26'.

The elements 29 and 29" are so dimensioned as to be received within theelement 28, andeach' is provided adjacent its forward edge'with an.external, outwardly directed annular flange 43 which is adapted to bereceived within the rearward portion of the recess 36'0f theelement 26or26. 5

The elements 21 and 21', 29 and 29', differ primarily in the contour ofthe inner walls thereof. Thus, as illustrated, the wallsof the elements21 and 29 are provided intern-ally with one or more shouldered teeth orbarbed projections 44 and 45, respectively, whereas the inner walls ofthe elements 2'! and 29', are smooth as indicated at 46 and 41,respectively. Additionally, the element 29 is provided with an outwardlyextending projection orheaded pin 48. The pin 48 is preferablypositioned 180 from the'longitudinal center of the opening 33. Ifdesired; the element 29 may beprovided with a similar projection orheaded pin.

wardly extending. projections; orheaded pins 49 and 5B. The pin 49 ispositioned preferably on the forward end portion 39 and spaced 180 fromthe longitudinal center ofthe opening 30. The

pin 50 is positioned in the slot 3'1 and" preferably a right anglewiththe surface and the;rear

The element 26 di ifersrfromv the -elernent'26' in that the element 26is provided-with two -in--:

6. ward edge 52of the element 29 or 29' forms a continuation of the edge5|. Thus the'forward face I 6 or I6 of the annular wall IE or I5 01 thenut 9 or 9' squarely engages the rearward edge or edges of thecompression members, and the force applied thereto is, in its entirety,applied along the annular walls of the elements forming the compressionmember in a direction parallel to the outer tapering surfaces 34 and 35thereof, or in other words, in a direction parallel to the inner wall orsurface 5 of the sleeve 4. Thus maximum utilization of the force appliedis obtained.

The preferred manner of assembling the compression member A illustratedin Fig. 3 is as follows:

- The longitudinal centers of the slots 30 and 3| of the elements 26 and21 are displaced 180 and the element 21 is passed into and through therearward portion of the element 26 until the flange 49 abuts the forwardedge of the recess 35. The longitudinal centers of the slots 32 and 33of the elements 28 and '29 are displaced 180 and the element 29 ispassed into'and rearwardly through the element 28 until the flange 43abuts the flange 4|. The elements 28 and 29 are then compressed radiallyinwardly, and, with the'longitudinal centers of the slots 32 and 33'displaced 90 from the longitudinal centers of the slots 30 and 3|, theelements 28 and 29 are passed into the rearward edge portion of theelement 26 and the flange 4| positioned inthe recess 31. In thisposition, the flange 43 of the element 29 abuts the flange 46 of theelement 21. Ordinarily,friction between the elements is sufiicient tomaintain the same in the annularly spaced relationship above described,"since, in assembling, it is unnecessary to apply any rotational force tothe various elements. r v

The modified form'of compression member B illustrated in Fig. 5 may beassembled in the same manner as that just described-in connection withthe compression member A. Fig. 5 illustrates the slots 36, 3|, 32 and 33angularly spaced as above described and, it will be obvious fromthisfigure that the projections or pins 48,-49 and 50 limit the relativerotational movement. of the-various elements. Thus. the .pin 49is sopositioned as to engage the sides of the slot 3| to limit-such movementbetween the elements 26 and 21'; the pin 48 is so positioned as toengage the sides of the slot 32 tolimit such movement between the.

and has two relatively movable, overlapping end portions and.5 6 ofreduced thickness to render,

the element resilient'orcompressible radially inwardly. The element 53is'provided 'internally,' in the form illustrated, with a"pluralityofshoul dered projections or barbed teethfi'l."Tire-rear ward edge portionof the element 53 is provided with an inwardly directed annularflangetll and an annular recess'59 inwardly of and adjacent the flange58. I

4 The element 54 is also of split-ring form and has two overlappingendiportions and 6| of reduced thickness: The forward end portion of theelement 54-is:provided externally thereof 'with anqoutwardly directedannular flange 62 adaptedto be received. in the recess 59, and anannular recess 63 rearwardly of and adjacent the flange 52 adapted toreceive the flange- 58. If desired, the element 54 may be provided alsowith a shouldered tooth or barbed projection 64, and the rcarwardedge8-5 preferably extends inwardly at arr-*angle of 90 from the outersurface 66' for the reasons previously described.

In assembling the compression member C, the element is compressedradially inwardly, passed into the rearward end of the element 53, andthe flange 62- positioned in the recess 59. Preferably the longitudinalcenter line of overlapping ends 55 and 56 is spaced 180 from thelongitudinalcenter line of. the overlapping ends 69 and 6 I.

:As illustrated, the elements 53 and 54 are fiu'sto-conical in sideelevation, converging forwardly, and, in assembled relationship thetaporing outer walls or surfaces 61 and 66, respec tively, form. asubstantially continuous surface having? the same taper as thefrusto-conical wall 5 and. closely engage the same. The minimum outerdiameter of the element 53 relative to the maximum diameter of the bore5' is preferably the same as that previously described, although notnecessarily so, as also previously described. It is to be understoodthat the barbed projections 51' and 64 may be omitted if desired.

The modified form of compression member D illustrated in Figs. 9 and 10is also annular in form and comprises two annular or ring-like elements68 and 69. Each element 68 and 69 is of split ring form and has a slot19 and H, respectively, extending through a substantial angle, such as49 as above described, to render the same resilient or compressibleradially inwardly.

The elements 68 and 6B are frusto-conical in side elevation, convergingforwardly as illustrated, and in assembled relationship, the tapering'outer walls or surfaces 12 and [3, respectively, form a substantiallycontinuous surface having the same taper as the frusto-conical wall 5,and closely engages the same. The minimum outer diameter of the element68 preferably bears the same relation to the maximum diameter' 01' thebore 5' as previously described, although not necessarily so, as alsopreviously de--' scribed.

The element 68 is provided internally and ad- ,1 acent the rearward edgethereof with an annular recess 14 and an annular flange l5 rearwardly ofandadj'acent the recess. The recess 14 is provided with a small bore 16to receive an inwardly extending projection or headed pin 1-1 at a pointsubstantially 180 removed from the longitudinal center line of the slot'19. The manner of mounting the pins 49, 59 and El may be identical withthat shown in Fig. 9, if desired.

"The 'elementfifl is provided externally adjacent its forward edge withan outwardly directed annular flange 18 adapted to be received withinthe recess lhandanannular recess 19 rearwardly thereof and adjacentthereto adaptedto receive the flange The rearward edge of the element59, or at least the outer portion 89 thereof, preferably forms a rightangle with the surface 13 forthe reasons previously described.

In assembling the compression member D, the longitudinal centers of theslots 19 and H are displaced 180, the element 69 is compressed radiallyinwardly, and the flange 18 positioned in the slot 14. The pin 11 is sopositioned to engage thcsides of the slot H and thus limit therela- 8tivelyangular or rotational movement between the elements 68' and 69.

The compression member E illustrated in Fig. 11 i a slightly modifiedform of the compression member A; 'In this form of compression memher,the outer rear element 28 is the same as that previously described, butthe inner rear element 29" differs from the element 29 in that itis'slightly longer and provided externally ad-' jacent its rearward endwith an annular recess 8i, and an outwardly directed annular flange 82rearwardly of and adjacent the said recess.

The recess BI is adapted to receive the annular flange l5'of the nut 9(or 9'), and the flange 82 functions as an extractor for the compressionmember when the not 9 is backed out of the outer end portion 1' of thesleeve 4.

In assembling the nut 9 (or 9') with the compression member E, it isonly necessary to compress the elements 28 and 29" radially inwardlyuntil the flange l5 (or [5) will pas over the flange 82 to be receivedin the recess BI, and this may be done either before or after assemblyof the elements 28 and 29-" with the elements 26 and 21. 1 I

It will be obvious that the element 29 of the compression member B maybe modified, if desired, in the manner just described in connect-ionwith the compression member E.

The compressionmember F illustrated in'Fig. I2 is a slightly modifiedform of the compression member D. In this form of compression member,the rear element 69' differs from the element 6%? in that the element69' is slightly longer and provided externally adjacent its rearward endwith an annular recess 83, and an outwardly directed annular flange 84rearwardly of and adjacent the-said recess. The forward edge of therecess '83 forms a right angle with the external surface 13" of theelement 69' for the reasons previously described.

The recess 83 is adapted to receive the annular flange [5 'of'the nut 9(or 9'"), and the flange 84 functions as an extractor for thecompression member in the manner previously described in connection withthe compression member E.

assembling the nut 9 (or 9') with the compression member F, it is onlynecessary to compress the element 69' radially inwardly until the flange5' (or IE) will pass over the flange 84 to be received in the recess 83,and this may be done either before or after assembly of the element 59'with the element 68.

It will be obvious that the element 54 of the compression member C maybe modified, if desired, in the manner just described in connection withthe compression member F.

In the preferred manner of assembling my coupling device, the but 9 (or9') is slipped over the end of the hose, followed by the compressionmember A, B, 1 D, E or F, and both'the nut and compression member arepositionedrearwardly of the end of the hose a distance suiiicient topermitthe end of the hose to be easily passed over the nipple H! CH)" or[9") and abut the shoulder 8. Then the nut 9 (or 9") is forcedforwardly, pushing the compression member into the sleeve 4 until thethread M (or M") reaches the thread 8'. The nut 9 (or 9') is thenrotated toscrew the thread M (or M) into the thread 8.

The compression member frictionally engages the outer surface of thehose II and as the nut 9 (or 9') is axially advanced into the sleeve 4,the compression member is gradually contracted about the hose, incidentto the taper of the wall '9 5, and the'hose is contracted about thenipple I (1' or [0). By staggering the splits in the split-ringcompression elements in the manner described above, a more uniformcontraction of the hose about the nipple'is obtained. The frictionalengagement between the compression member and the hose H is such thatthe compression member is held from turning on the hose, and as the nutprogresses aXi-ally into the housing the hose is urged forwardly towardthe annular shoulder .6 and the end portion of the hose is caused tobecome compressed axially and expanded radially. Thus a primary seal isprovided between the hose II and the nipple I0 (10' or I0"), and asecondary seal is provided between the end of the hose and the annularshoulder 6. I

" As stated previously, the nut may be actuated entirely by'hand, ifdesired. By actual test, a hose connected to my coupling device by handhas withstood pressures up to 500 lbs. per square inch without leaking.The ordinary operatin pressure, in gasoline pumps, gasoline and fuel oiltanks, and the like, is approximately 40 lbs. per square inch.

Upon failure of the hose at or within the coupling, the nut 9 (or 9) maybe backed out of the sleeve, 4 and the hose pulled from the nipple l0([0' or 10). If the compression member is of the type illustrated inFigs. 11 and 12, the compression member will be removed with the nut. If'not, the compression member will be removed with the hose. Thefaultyend of the hose mayv be cutjofi, and the hose reconnected to thecoupling device in the manner previously described.

The modified formof compression member G illustrated in Fig. 18comprises an annular elements 85 having a hose receiving bore 86 ofsubstantially uniform diameter to receive the hose [Land a taperingouter surface or wall 81, con- -vergingforwardly, whereby the thicknessof the annular member 85 decreases forwardly.

f'The rearward edge 88 of the annular element 85 preferably forms aright angle with the outer surfaceor wall 81 for the reasons previouslydescribed, and the angle of taper of the outer surface 8'! is the sameas the angle of taper of the bore.

To provide for compression radially inwardly as well as longitudinallythereof, the element 85 isspirally cut to form a spiral slot 89extendingtherethrough from edge to edge.

,If desired, the edge 88-of the element 85 may be modified in the mannerillustrated in Fig; 12

to provide the same with an annuar recess and flange to connect the nut9 (or 9') thereto.

The manner of assembling the coupling device with the hose I], using thecompression member G, is the same as previously described inconnectionwith the other compression members disclosed. It will be obvious thatwhen-the element 85 is compressed about the flexible hose II, thatportions of the hose will be gripped between adjacent turns 90 and hencethe hose will be urged forwardly toward the annular shoulder B ofthehousing I to form a secondary seal in the manner previouslydescribed.

Figure 19 illustrates a modified form of annula recess and groove thatmay be used instead of the angular or rectangular recesses and grooves10 having a transversely curved surface, and an adjacent inwardlyextending edge flange 93 having a transversely curved surface.

The rearward compression element 94 has an outwardly extending edgeflange 95 having a transversely curved surface adapted to be receivedwithin the recess 92, and an adjacent recess '96 having a transverselycurved surface and adapted to received the flange 93.

The transversely curved recesses and grooves illustrated in Fig, 19 havean advantage in facilitating the assembly of the compression elements.

A tertiary seal is provided by and within each of the compressionmembers described above. Preferably, all surfaces of each of theelements comprising the various compression members are highly machinedor polished. Hence, where these surfaces contact with each other, withthe wall 5, or with the hose, an effective seal is provided. Also, themating recesses and grooves described ar preferably so constructed as tohave suflicient tolerance'to prevent leakage.

Referring to Figs. 1 and 5, and assuming fluid has in some manner leakedpast the end of the hose H, it will be seen that the path of leastresistance for the fluid to flow into the compression member is throughthe slot 30. However, due to the fact that the slots 30, 3|, 32 and 33are staggered relative to each other, and due to the fact that allsurfaces of the elements 26', 21, 28 and 29' are highly machined, andfurther due to the fact that the flanges M and 38 and recesses 3! and 42are constructed with suflicient tolerance to prevent leakage, such fluidflow is stopped when the fluid reaches the rearward edge of the recess42, thereby providing, as stated above, a tertiary seal within thecompression .members A and B. In a similar manner, fluid flow throughthe slot 3|, should this occur, will be stopped at the forward edge ofthe flange 43.

Tertiary seals are provided in a similar manner within the compressionmembers C, D, E and F.

It may also be here noted that tertiary seals may be provided within thecompression members A, B, C, D, E and F even when provided with therecesses and grooves as illustrated in Fig. 19, since these recessesandgrooves having curved surfaces may also be so constructed as to havesufficient, 'tolerancetopreventleakage.

With respect to, the compression member G,- Fig. l8, the tertiary'sealis provided in a slightly I different manner in that the forward two Orthree relatively thin turns 98 are compressed, when 1 pressure isapplied, and hence the relatively high-. Iy-machined facing surface ofthese turns contact each other to effectively close the spiralslot 89andtherebyprovide atertiary seal.

While-the invention is susceptible of various modificationslandalternative,constructions, I l have shown in the drawings andhave,herein de-.

scribed in detail the preferredmmbodiments, but

it is to be understood that I. do not thereby'intend'. I

to limit the-invention to the specificforms dis- 3'l 8 and 42,4l,-respectively, of Figs. 3 and 5;;

usa r u t a edin i 19. t rd ompression element 9| has an internal recess92 closed, but intend to'cover all modifications and 1 alternativeconstructions falling .within'the spirit and scope, of theinvention asexpressed in the appended claims.

I claim:

1. In a compression member for use in a flexible hose coupling device, aunitaryannularelement having anexter'nal tapered wall surface, thesurface of a rearward edge of said element forming a, substantially aright .angle with said-tapered wall surface, and a spiral slotcomprising a plurality atlases 11 of turns extending in a continuousmanner entirely through said element, whereby said element may becompressed axially and radially inwardly by means of pressure appliedagainst the said rearward edge of said element.

2. In a compression member for use in a flexible hose coupling device, aplurality of split-ring elements, at least one of said elements havingan external tapered wallsurface, and means connecting said elementstogether against substantial relative axial movement but for relativeangular movement.

' '3. In a compression member for use in a coupling device, a pluralityof split-ring elements, at least one of said elements having an externaltapered wall surface, means connecting said sph ring elements togetheragainst substantial relative axial movement but for relative angularmovement with the splits thereof angularly spaced from each other, andmeans limiting the relative angular movement of said elements.

'4. Ina compression member for use in a coupling device, a plurality ofsplit-ring elements, at least one of said elements having an externaltapered wall surface, means connecting said splitring elements togetheragainst substantial relative axial movement but for relative angularmovement with the splits thereof angularly spaced from each other, and aprojection on one of said elements extending into the split of anotherof said elements.

5. In a compression member for use in a .cou

pling device, a plurality of split-ring elements, at least one of saidelements having an external tapered wall surface, an annular -flange onone of said elements, and an annular groove in another of said elementsreceiving said flange and connecting said elements together for relativeangular movement.

6. in a compression member for use in a .coupling device, a plurality ofsplit-ring elements, at least one of said elements having an externaltapered wall surface, an annular flange on one of said elements, anannular groove in another of said elements receiving said flange andconnecting said elements together for relative angular movement, thesplits in said split-ring ele merit-s being angularly spaced from eachother, and means limiting the relative angular movement of saidelements.

7. In a compression member for use in a coupling device, a plurality ofsplit-ring elements, at least one of said elements having overlappingterminal portions and an external tapered wall surface each of saidterminal portions being of uniform thickness in a circumferentialdirection, the combined thicknesses of the overlapped terminal portionsbeing approximately equal to the thickness of the intermediate portionsof the respective split ring elements, an annular flange on one of saidelements, and an annular groove in another of said elements receivingsaid flange and connecting said elements together for relative angularmovement.

8. In a compression member for use in a coupling device, .aplurality ofaxially aligned, splitring elements, each of said elements having anexternal tapered wall surface, the surface of a rearward edge of therearward-most element forming substantially a right angle with its saidtapered wall surface, and :means connecting said elements togetheragainst substantial relative axial movement but for relative angularmovement.

:9. A'couplingdevicexcomprising a housing, said housin comprising anannular shoulder and a sleeve, said sleeveliaving a forwardly taperedbore portion and a threaded end portion, a nipple carried by saidhousing adapted to receive .a hose or the like, said nipple extendinginto said tapered bore portion and forming an annular space with saidsleeve; compression means within said tapered bore, said compressionmeans comprising a unitary annular element having a rearward edge and anexternal forwardly tapered wall surface, a slot extending in acontinuous manner entirely through said element; and a threaded annularcompression nut rotatable relative to said compression member inthreaded engagement with said threaded end portion of said sleeve, saidcompression nut comprising a forward annular wall engaging said rearwardedge of said element and urging said compression means forwardly intosaid tapered bore, and the tapered 'bore portion of said sleevecompressing said compression member radially inwardly.

1-0. A coupling device comprising a housing, said housing comprising anannular shoulder and a sleeve, said sleeve having a forwardly taperedbore portion and a threaded endportion,

-- a nipple within said housing adapted to receive a hose or thelike,said nipple extending into said tapered bore portion and forming anannular space with saidsleeve, a compression member within said taperedbore, said compression member comprising an annular element having arearward edge and an external forwardly tapered wall surface, a spiralslot comprising a plurality of turns extending through said element,means forming an external annular groove comprising a forward walladjacent said rearward edge of said element, said forward wall formingsubstantially a right angle with said tapered wall surface, and athreaded annular compression nut in threaded engagement with saidthreaded end portion of said sleeve, said compression nut comprising aforward, inwardly directed annular wall in said annular groove urgingsaid compression said sleeve, a compression member within said taperedbore, said compression member comprising a plurality of split-ringelements, each of said elements having an external tapered wall surface,means connecting said elements-together against substantial relativeaxial movement but for relative angular movement, and a threaded annularcompression nut in threaded engagement with said threaded end portion ofsaid sleeve, said compression nut comprising a forward annular wallurging said compressionmem- 'ber forwardly into said tapered bore, andthe tapered bore portion of said sleeve compressing said compressionmember radially inwardly.

12. A coupling device comprising a housing, said housing comprising anannular shoulder and a sleeve, said sleeve having a forwardly taperedbore portion and a threaded-end portion, a nipple within said housingadapted to receive a hose or the like, saidnippleextending. intosaidtapered bore portion and forming an {annular space with said sleeve,a compression member within said tapered bore, said compression membercomprising a plurality of split-ring elements, each of said elementshaving an external tapered wall surface, means connecting saidsplit-ring elements together against substantial relative axial movementbut for relative angular movement with the splits thereof angularlyspaced from each other, means limiting the relative angular movement ofsaid elements, and a threaded annular compression nut in threadedengagement with saidthreaded end portion of said sleeve, saidcompression nut comprising a forward annular wall urging saidcompressionmember forwardly into said tapered-bore, and the tapered bore portion ofsaid sleeve compressing said compression member radially-inwardly.

13. A coupling device comprising a housing, said housing comprising anannular shoulder and a sleeve, said sleeve having a forwardly taperedbore portion and :a threaded end'portion, a nipple within said housingadapted to receive a hose or the like, said nipple extending into saidtapered bore portion and forming .an annular space with said sleeve, acompression member within said tapered bore, said compression membercomprising a plurality of splitring elements, each of said elementshaving overlapping terminal portions and an external tapered wallsurface, each of said terminal portions being of uniform thickness in acircumferential direction, the compressed thickness of the overlappedterminal portions being approximately equal to the thickness of theintermediate portions of the respective split ring elements, an annularflange on one of said elements, an annular groove in another of saidelements receiving said flange and connecting said elements together forrelative angular movement, and a threaded annular compression nut inthreaded engagement with said threaded end portion of said sleeve, saidcompression nut comprising a forward annular wall urging saidcompression member forwardly into said tapered bore, and the taperedbore portion of said sleeve compressing said compression member radiallyinwardly.

14. A coupling device comprising a housing, said housing comprising ananular shoulder and a sleeve, said sleeve having a forwardly taperedbore portion and a threaded end portion, a nipple within said housingadapted to receive a hose or the like, said nipple extending into saidtapered bore portion and forming an annular space with said sleeve, anannular compression member having a forwardly tapered outer wall surfacewithin said tapered bore, a spiral slot comprising a plurality of turnsextending through said compres-' sion member, and a threaded annularcompression nut in threaded engagement with said threaded end portion ofsaid sleeve, said compression nut comprising a forward annular wallurging said compression member forwardly into said tapered bore, and thetapered bore portion of said sleeve compressing said compression memberradially inwardly.

15. A coupling device comprising a housing, said housing comprising anannular shoulder and a sleeve, said sleeve having a forwardly taperedbore portion and a threaded end portion, a nipple within said housingadapted to receive a hose or the like, said nipple extending into saidtapered bore portion and forming an annular space with 14 said sleeve, acompression member within said tapered bore, said compression membercomprise ing a plurality of axially aligned split-ring ele-, ments, eachof said elements having an external tapered wall surface, the surface ofa, rearward edge of the rearwardmost element forming substantiallyaright angle with itssaid taperedwall surface, means connecting saidelements together against substantial relative axial movement but forrelative angular movement, and an externally threaded annularcompression nut in threaded engagement with said threadedend portion-;.of said sleeve, said compression nut comprisinga forward annular wallurging said compression member fo rwar dly intosaid tapered bore, thetapered bore portion of said sleeve compressing said compression memberradially inwardly, and the forward face ofsaid annular wall being in,-wardly and rearwardly sloping to squarely engage said rearward edge ofsaid rearwardmost element,- l6. A coupling device comprising a housing,said housing comprising an annular shoulder and a sleeve, said sleevehaving a forwardly ta-i;

pered bore portion and a threaded end portion; a nipple within saidhousingadapted to'receive a hose orthe like, said nipple forming anannular space with said sleeve, a compression member within said taperedbore, said compression member comprising a plurality of axially alignedsplitring elements, each of said elements having an external taperedwall surface, the surface of a rearward edge of the rearwardmost elementforming substantially a right angle with its said tapered wall surface,an annular flange on one of said elements, an annular groove in anotherof said elements receiving said flange and connecting said elementstogether, and an externally threaded annular compression nut in threadedengagement with said threaded end portion of said sleeve, saidcompression nut comprising a forward annular wall urging saidcompression member forwardly into said tapered bore, the tapered boreportion of said sleeve compressing said compression member radiallyinwardly, and the forward face of said annular wall being inwardly andrearwardly sloping to squarely engage said rearward edge of saidrearwardmost element.

1'7. A coupling device comprising a housing, said housing comprising anannular shoulder and a sleeve, said sleeve having a forwardly taperedbore portion and a threaded end portion, a nipple carried by andextending into said housing adapted to receive a hose or the like, saidnipple forming an annular space with said sleeve, an annular split-ringcompression member having a forwardly tapered outer wall surface withinsaid tapered bore, and a threaded annular compression nut in threadedengagement with said threaded end portion of said sleeve, saidcompression nut comprising a forward annular wall and a tail piececomprising an annular guard member, the external wall surface of saidguard member tapering inwardly toward the free end thereof, a spiralslot in said guard member, said forward wall urging said compressionmember forwardly into said tapered bore, and the tapered bore portion ofsaid sleeve compressing said compression member radially inwardly.

18. A coupling device comprising a housing, said housing comprising anannular shoulder and a sleeve, said sleeve having a forwardly taperedbore portion and a threaded end portion, a nipple within said housingadapted to receive a hose or the like, said nipple extending into saidtapered bore portion and forming an annular space with amass saidsleeve, a compression member within said taperedbore, said compressionmember comprising a plurality ofaxially aligned split-ring elements,'-atleast one of said elements having an external tapered wall surface,-anannular flange on one of said elements, an annular groove in another ofsaid elements receiving said flange and connecting said elementstogether, and an externally threaded annular compression nut in threadedengagement with said threaded end portion of said sleeve, saidcompression nut comprising a forward annular wall urgingsaidcornpression member 'for-wardly into said tapered bore, the tapered boreportion of-said sleevecompressing said compression member radiallyinwardly.

19. A hose coupling comprising a housingmen her having a sleeve portion,said sleeve portion shaped 'to receive the end of a hose and having a"tapered bore and an internally threaded end portion, a compressionmember within said tapered bore having a tapered surface which cor-:responds to the inner surface of said tapered bore, a threaded annularnut engaging thesaid internally threaded end portion of said sleeve 16 aP rt on eax e l a adie m s he mpression member within the tapered boreofsaid sleeve portion, said annular nut having a tail piece in the form ofan annular guard member, the outer surface of said guard member taperinginwardly toward theiree end thereof, and a spiral-slotin said guardmember.

C. MAURICE REFERENCES CITED The following references are .of record inthe file of this patent:

UNITED STATES PATENTS Number Name Date 796,599 McIntyre Aug. 8, 19051,567,324- Jurs Dec. 279, 19 25 1 699591 Jennings Jan. 22, 1929 2,428,-176- Parker -Sept. 30, 1947 a FOREIGN PATENTS Number Country. Date1265;293 :Great Britain June 30, 1920 654,476 France Nov. '29, 19289431320: Great Britain July 4, 1935 I 492959.

Great Britain 'Sept. '29-, 1938

